A Hybrid Renewable Energy Distributed Generation System with Vanadium Redox Battery (VRB)

Abstract

Renewable technologies are matured; hybrid renewable energy system is promising to replace conventional fossil fuel distributed power generation. Renewable energy sources are inexhaustible and are renewed by nature itself. Due to ever increasing energy consumption, rising public awareness of environmental protection, and steady progress in power deregulation, alternative (i.e., renewable and fuel cell based) distributed generation (DG) systems have attracted increased interest. Wind and photovoltaic (PV) power generation are two of the most promising renewable energy technologies. Renewable energy sources are inexhaustible and are renewed by nature itself. This paper focuses on a photovoltaic/wind based hybrid power system. This system has three different sources namely solar, wind, and battery power to produce a continuous power supply. The available solar and wind output is boosted to the required level and connected to a common DC bus. The battery for this system is Vanadium Redox flow Battery (VRB). The performance of the energy storage system can be improved by VRB. This paper proposed the hybrid renewable energy system with VRB and the simulation results of VRB. The MPPT is implemented using Perturb and Observe algorithm to obtain the maximum power point. This DC is suitably converted into an AC by a PWM inverter to supply an AC load. In the absence of both wind and the solar output the load is connected through a battery backup source to supply power to the load. KEYWORDS:Hybrid system, Distributed generation, Photovoltaic/Wind, Vanadium Redox flow Battery. I.INTRODUCTIONEnergy is essential to everyone's life no matter when and where they are. This is especially true in this new century, where people keep pursuing higher quality of life. Among different types of energy, electric energy is one of the most important that people need every day. Since natural energy sources are finite and produce pollution, the applications of renewable energy sources in the form of clean technology could be the right solution to solve the energy crisis in the recent century. In order to meet ever increasing demand for conventional energy sources, applications with clean renewable energy technologies such as photovoltaic (PV) energy and wind energy have been vigorously developed in recent years. Hybrid wind-PV system has higher availability to deliver continuous power than either individual source. Distributed generation technologies can provide customers with the energy solutions that are more cost effective, more environments friendly or provide higher power quality or reliability than conventional solutions [1,2]. In our paper a double input and single output power converter is developed for combined Wind-PV power generating systems. And also these circuits have a path for backup energy banks.Distributed generation (DG) can be defined as a source of small electric power connected to a distribution network or at a customer site, representing an innovative and efficient way to both generate and deliver electricity....